Xanthine compound and use thereof
US-2018305329-A1 · Oct 25, 2018 · US
Pyronines {; Xanthon, thioxanthon, selenoxanthan, telluroxanthon dyes}
Pyronines {; Xanthon, thioxanthon, selenoxanthan, telluroxanthon dyes} · Cooperative Patent Classification (CPC)
Chemical and metallurgical processes, compounds, and materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | C09B11/28 |
| Official title | Pyronines {; Xanthon, thioxanthon, selenoxanthan, telluroxanthon dyes} |
| Display label | Pyronines {; Xanthon, thioxanthon, selenoxanthan, telluroxanthon dyes} |
| Total patents | 167 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 12 |
| 2016 | 17 |
| 2017 | 20 |
| 2018 | 22 |
| 2019 | 25 |
| 2020 | 14 |
| 2021 | 16 |
| 2022 | 7 |
| 2023 | 10 |
| 2024 | 13 |
| 2025 | 8 |
| 2026 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Super-resolution imaging compositions and methods using same
US-10087199-B2 · Oct 2, 2018 · US
Electronic device
US-10065959-B2 · Sep 4, 2018 · US
Rhodamine-based colorant compound and process for producing same
US-2018244923-A1 · Aug 30, 2018 · US
Long wavelength voltage sensitive dyes
US-2018209987-A1 · Jul 26, 2018 · US
Carbopyronone compounds useful as diagnostic adjuvants
US-10018617-B2 · Jul 10, 2018 · US
Ph sensitive fluorescent probe
US-2018118943-A1 · May 3, 2018 · US
Fluorogenic pH sensitive dyes and their method of use
US-9939454-B2 · Apr 10, 2018 · US
Azetidine-substituted fluorescent compounds
US-9933417-B2 · Apr 3, 2018 · US
Fluorogenic pH sensitive dyes and their method of use
US-9910051-B2 · Mar 6, 2018 · US
Recording material and recording sheet
US-2018022137-A1 · Jan 25, 2018 · US
Compound and photoelectric device, image sensor and electronic device including the same
US-2017352811-A1 · Dec 7, 2017 · US
Color material dispersion liquid for color filter, color resin composition for color filter, color material for color filter, color filter, liquid crystal display device, and light-emitting display device
US-2017349755-A1 · Dec 7, 2017 · US
Color material dispersion liquid for color filter, color resin composition for color filter, color material, color filter, liquid crystal display device, and light-emitting display device
US-2017342271-A1 · Nov 30, 2017 · US
Compound, polymer, photosensitive resin composition, and color filter
US-2017248846-A1 · Aug 31, 2017 · US
Coloring composition for textile printing, textile printing method, ink for ink jet textile printing, and dyed fabric
US-2017247544-A1 · Aug 31, 2017 · US
Coloring composition, ink jet recording ink, and ink jet recording method
US-2017210928-A1 · Jul 27, 2017 · US
Asymmetrical Si rhodamine and rhodol synthesis
US-9714260-B2 · Jul 25, 2017 · US
Coloring material and method for producing the same
US-9708244-B2 · Jul 18, 2017 · US
pH sensors
US-9702824-B2 · Jul 11, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C09B11/28?
- CPC C09B11/28 is the Cooperative Patent Classification code for “Pyronines {; Xanthon, thioxanthon, selenoxanthan, telluroxanthon dyes}.”
- How many patents are filed under CPC C09B11/28 (Pyronines {; Xanthon, thioxanthon, selenoxanthan, telluroxanthon dyes})?
- Our database includes 167 publications tagged with this CPC code.
- Is patent activity under CPC C09B11/28 growing?
- Publication counts under this code: 13 in 2024 vs 8 in 2025 (latest complete years).